以工业固体废弃物镍渣和偏高岭土为原料,以水玻璃为激发剂,在相同稠度下制备镍渣/偏高岭土基地聚合物.研究了镍渣种类和掺量对地聚合物力学性能和体积变化的影响,测定了地聚合物的碱溶出情况,并利用XRD、SEM-EDS对地聚合物的矿物组成和微观形貌进行分析.结果表明:随着水淬镍渣掺量的增大,地聚合物的抗压强度先增大后降低,在镍渣掺量为50％、液固比为0.45时,地聚合物的抗压强度最大,28 d达到58.8 MPa;而随着风冷镍渣掺量的增大,地聚合物的强度逐渐降低.此外,水淬镍渣/偏高岭土基地聚合物的体积变化主要表现为膨胀,而风冷镍渣/偏高岭土基地聚合物表现为收缩.%A series of nickel slag/metakaolin based geopolymer were prepared under the same consistency using industrial solid waste nickel slag and metakaolin as raw materials,water glass as activator.The effect of nickel slag type and content on the mechanical properties and volume change of the geopolymer were studied.The alkali dissolution of geopolymer was characterized by pH analyzer,the mineral composition and microstructure of the geopolymer were analyzed by XRD and SEM-EDS.With the increase of the amount of water-hardening nickel slag,the compressive strength of geopolymer first increased and then decreased.The compressive strength of the geopolymer with 50％ nickel slag and 0.45 liquid/solid ratio reached the maximum value (58.8 MPa(28 d)).The incorporation of air quench reduced the compressive strength.In addition,water-hardening nickel slag/metakaolin geopolymer had a expansion behavior,air quench nickel/metakaolin geopolymer had a shrinkage behavior.
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